21344716612 has 6 divisors (see below), whose sum is σ = 37353254078. Its totient is φ = 10672358304.

The previous prime is 21344716597. The next prime is 21344716643. The reversal of 21344716612 is 21661744312.

It can be written as a sum of positive squares in only one way, i.e., 16896360196 + 4448356416 = 129986^2 + 66696^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2668089573 + ... + 2668089580.

Almost surely, 2^21344716612 is an apocalyptic number.

It is an amenable number.

21344716612 is a deficient number, since it is larger than the sum of its proper divisors (16008537466).

21344716612 is a wasteful number, since it uses less digits than its factorization.

21344716612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336179157 (or 5336179155 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The spelling of 21344716612 in words is "twenty-one billion, three hundred forty-four million, seven hundred sixteen thousand, six hundred twelve".